Add missing Statement classes

[dicarlo2]

Hi @dsherret, first off, thanks for creating a great library, it's proven to be invaluable for a project I'm currently working on. There are some missing wrappers that I'd like to see in the library. I need this rather urgently, so I'll likely publish my own package while waiting for reviews/release, but I'd love to contribute back to the library. I don't see contributor guidelines, so I'm going to just mimic some of your previous commits.

[dsherret]

Sounds great! Yeah, I was thinking last night about how I can make contributing easier. I'm going to devote some time to that over the next few weeks and clean up some of the internals in the library so things are more straightforward.

[dsherret]

@dicarlo2 I'll do a minor release when I get home tonight.

[dicarlo2]

With these prs all statements should be there except WithStatement, honestly not going to bother because it's not valid typescript or strict javascript, so it basically shouldn't ever show up in a program.

[dsherret]

@dicarlo2 I was feeling up for it so I went ahead and added WithStatement. I'm thinking perhaps someone in the future might want to write a script that automatically removes all WithStatements from an application.

Edit: Also, I removed the fill method on ForOfStatement for the time being. That should be more developed for it to be a feature... I'll add it back in the future probably.

[dsherret]

I believe this is implemented now. Closing.

This will be available in 5.4.0. I'm just building and publishing it now.

[dicarlo2]

Thanks for the quick reviews!